Syntheses of Divalent Rare Earth Ternary Halides KYbBr3, KYbCl3, KSm2Br5, KSm2Cl<5, KEu2Cl<5 by Alkalimetallothermoreduction
Lin Pingdi, Wu Guoqing, LU Xiukai, Xu Bi
Chemical Research in Chinese Universities . 1990, (1): 73 -75 .